py-pdf/pypdf · Security
pypdf: Possible large memory usage for streams with multiple filters
- GHSA ID
- GHSA-7mh2-4gg2-979f
- CVE ID
- CVE-2026-113795
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing any stream with a large amount of filters or multiple filters which pass around large amounts of data.
Patches
This has been fixed in pypdf==6.20.0.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4173.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f ↗
- https://github.com/py-pdf/pypdf/pull/4173 ↗
- https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185 ↗
- https://github.com/py-pdf/pypdf/releases/tag/6.20.0 ↗
- https://github.com/advisories/GHSA-7mh2-4gg2-979f ↗